JP2932628B2 - Electric car control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention receives power supplied from an AC feeder cable, converts it into DC by a converter, converts it into three-phase AC by an inverter, and feeds it to an induction motor or the like to control it. The present invention relates to an electric vehicle control device that performs the following.

[Conventional technology]

FIG. 3 shows a circuit configuration of this type of conventional electric vehicle control device. In FIG. 3, (1) shows a primary winding of which is connected to an AC feeder (3) via a pantograph (2). A main transformer (4) is a converter connected to a secondary winding of the main transformer (1), and converts a single-phase alternating current from the main transformer (1) into a direct current. The converter (4) uses four phases of a main circuit arm (6) formed by connecting two arms of a semiconductor element (5) such as a GTO thyristor in series with each other. As described above, a single-phase bridge is formed for each secondary winding of the main transformer (1), and its output side is connected in parallel.

As described above, the parallel configuration of the two bridges is as follows.
The main purpose is to improve the smoothness of the DC voltage supplied to the inverter (7) by shifting the phase of the gate signal to the semiconductor element (5) of both bridges.

(7) is an inverter connected to the output side of the converter (4), which converts a DC output from the converter (4) into a three-phase AC and supplies power to the induction motor (8). And this inverter (7) is a main circuit arm (6) for three phases of U, V and W.
It is composed of (9) is a protection circuit including a thyristor that conducts when an overvoltage occurs and a reverse conducting diode.

FIGS. 4 and 5 are specific structural diagrams of the converter (4) and the inverter (7), respectively. As shown in the figure, both the main circuit arm (6) and the protection circuit (9) are individually housed in the container (10), respectively, and the electric blower (12) arranged via the duct (11).
Cooled by cooling air from (13) is a peripheral component provided on the exhaust side of each main circuit arm (6), and is a component such as a resistor that generates a relatively large amount of heat. Each of the above devices is housed in an outer box (14), and an air filter (15) is provided on the air inlet side. Further, (16) is a peripheral component housed in a separate room formed on the side surface of the outer box (14), and is composed of a component that generates a relatively small amount of heat. The arrows in the figure indicate the flow of the cooling air.

[Problems to be solved by the invention]

As described above, the conventional electric car control device has a configuration in which one phase of the main circuit arm (6) is accommodated in the container (10), so the wiring between the containers (10) is complicated and the amount is large. ,
In addition, the shape of the duct (11) becomes complicated, and the dimensions of the entire device,
There was a problem that both weights increased.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a small and lightweight electric vehicle control device by simplifying wiring and equipment configuration.

[Means and actions for solving the problem]

An electric vehicle control device according to the present invention comprises a main circuit unit in which two phases of a main circuit arm of a converter are housed in a common container having the same shape as each other as units connected to each other. A main circuit unit in which two phases of the main circuit arm of the inverter are housed in a common container having the same shape as that of the common container as a unit having a connection between them, and another main phase of the main circuit arm. And the protection circuit are constituted by a circuit unit which is housed in a common container having the same shape as the common container as a unit having a connection between them, and the four common containers are arranged in two rows and two columns. The cooling air is sent in series in the direction of the rows or columns to cool the air, and the main circuit unit of the converter and the inverter can be shared.

In this case, the number of terminals on the DC side drawn out of the container is reduced, and wiring is simplified accordingly. In addition, the number of containers is reduced to almost half, and it is possible to use the container for both the converter and the inverter. Therefore, the configuration of the whole apparatus is simple, light and small.

〔Example〕

FIG. 1 is an arrangement structure diagram showing an electric vehicle control device according to one embodiment of the present invention, and FIG. 2 is a circuit configuration diagram thereof. Here, two-phase main circuit arms (6) are housed in a common container (18) as one main circuit unit (17).
Specifically, the first and second phase main circuit arms (6) of the converter (4), the third and fourth phase main circuit arms (6) of the converter (4), and the inverter (7) Combining the U-phase and V-phase main circuit arms (6) respectively,
No.1 unit has the same configuration. Here, even if the main circuit unit (17) of the converter (4) and the inverter (7) has the same configuration, there is no large excess or deficiency in rating selection for the following reasons. That is, as described with reference to FIG. 3, the converter (4) has a parallel configuration of two single-phase bridges mainly for improving the waveform of the DC output voltage. As a result, the capacity of one arm of the converter (4) is reduced, and the ratings such as the capacity of the semiconductor element (5) of the converter (4) and the inverter (7) are relatively close.

In addition, the W-phase main circuit arm (6) of the inverter (7)
Is combined with its protection circuit (9) and No.2 unit (19)
The container (2) has the same shape as the container (18) of the No. 1 unit.
0).

And the main circuit arm (6) in each container (18) (20)
Among these terminals, those connected to the same polarity on the DC side are connected inside the container, and the number of the lead-out terminals to the outside of the container is reduced by half.

As shown in FIG. 1, a total of four units (17) and (19) are placed in a common outer box (21) in two rows (rows are in the vertical direction of the figure) and two columns (columns are in the horizontal direction of the figure). And side by side)
An electric blower (12) arranged via a duct (11) cools the cooling air by blowing common cooling air in series in the column direction.
Note that a unit for the inverter (7), which reduces the generated loss as a whole, is arranged on the leeward side. Also,
Reference numeral (22) denotes a peripheral component integrally formed with each of the units (17) and (19). Specifically, an anode reactor, a voltage detection element, and a capacitor connected to the semiconductor element (5) and the protection circuit (9) , A resistance element, and the like.

As described above, since the main circuit arms for two phases are housed in a common container, parts and space required for mounting and insulating each main circuit arm can be reduced or omitted.
In addition, the number of wires outside the container, which tends to increase in size and shape due to cooling and insulation conditions, is greatly reduced, and the entire device can be downsized.

In addition, since the number of containers is reduced and the containers are formed in the same shape, arrangement with a good space factor becomes possible, so that the entire space is reduced and assembly is simplified.

Further, since the main circuit unit of the converter (4) and the inverter (7) is of a common type, maintenance and management of the spare unit are simpler and more economical.

In addition, since the converter (4) and the inverter (7) are configured as an integral type that is housed in the common outer box (21), the amount of wiring is small, and the workability of attaching and detaching to and from the vehicle body is facilitated, and externally. Since the number of wirings is small, an induction obstacle surface is also advantageous.

Further, in the above embodiment, the peripheral components are formed integrally with the main circuit unit. However, depending on the specific components, the peripheral components may be individually arranged.

〔The invention's effect〕

Since the present invention is configured as described above, the number and types of containers for accommodating semiconductor elements are reduced, wiring outside the container is simplified, and the overall configuration of the device is simple, lightweight and compact, and maintenance and spare Container management is simple and economical.

[Brief description of the drawings]

FIG. 1 is an arrangement diagram showing an electric vehicle control device according to an embodiment of the present invention, FIG. 2 is a circuit configuration diagram thereof, FIG. 3 is a circuit configuration diagram showing a conventional electric vehicle control device, FIG. Fifth
The figure is the layout structure diagram. In the figure, (4) is a converter, (5) is a semiconductor element, (6) is a main circuit arm, (7) is an inverter, (1)
7) is a main circuit unit, and (18) is a container. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

(57) [Claims] A converter for converting a single-phase alternating current into a single-phase direct current by using four main phases of an arm composed of semiconductor elements to form a main circuit arm for one phase by connecting two arms in series with each other. An inverter for converting the direct current into a three-phase alternating current by using the main circuit arm for three phases and a protection circuit formed by connecting semiconductor elements in series, and accommodating the main circuit arms in a container. A main circuit unit in which two main phases of the main circuit arm of the converter are housed in a common container having the same shape as each other as units connected to each other; A main circuit unit and a main circuit arm, wherein two phases of the main circuit arm described above are housed in a common container having the same shape as the common container as a unit having a connection between them. And the protection circuit is constituted by a circuit unit which is housed in a common container having the same shape as the common container as a unit having a connection between them and the four common circuits. An electric vehicle control device characterized in that containers are arranged in two rows and two columns and cooling air is blown in series in the direction of rows or columns for cooling, and a main circuit unit for the converter and the inverter can be shared. .